When talking about gas fire suppression systems, we normally know of the HFC-227ea system this system is very famous and popular all over the world, this article is to discuss how the design quantity of the HFC-227ea fire suppression agent is calculated.

Steps for Design HFC-227ea Fire Suppression Agent

Hereby below we have several steps to calculate how the hfc-227ea fire suppression system is calculated for use:

Step One: Calculate the net volume of the protection zone (hazards), normally in units of cubic meters.

Steps Two: According to your project type to confirm the Design Application Density (C1 in %), normally:
1. Library, Museum, Archive, and similar places, for these protection zones or hazards, its design application density is 10%.
2. Transformer room, Power distribution room, Generator room, and similar places, for these protection zones or hazards, its design application density is 9%.
3. Telecommunication room, Computer room, Server room, and similar places, for these similar protection zones or hazards, its design application is 8%.

Remark: The above design application density is according to the “Prescriptive Fire Protection Design Code, P.R.C-GB50370-2005”, and may not be suitable for some European Countries and the American area.

Step Three, Know the minimum temperature in the protection zone (hazards), to calculate a specific volume factor (“S” in cubic meter per kilogram) under air pressure of 101Kpa and minimum environment temperature.
S=0.1269+0.000513T

Step Four, Find out the Altitude Correction Factor (K) in your area, The “K” value can be as per the attached list of GB50370-2005.

Remark: “Altitude Height” is “Height Above sea level”.

Step Five, the Calculation Formula is as follows:

Design Case Presentation

For Example:

one archive room is 11.5 meters in length, 9 meters in width, and 3 meters in height, the minimum environment temperature is 20℃, the Altitude height is no more than 500 meters, we use a cabinet type non-piping HFC-227ea (fm200) fire suppression device as a total flooding system for solution, please calculate the quantity of the hfc-227ea fire extinguishing agent.
Answer:
1. Net Volume V=11.5*9*3=310.5 cubic meters.
2. Design Application Density C1=10.
3. As Per the attached list, altitude correction factor K=0.
4. Specific Volume Factor is S=0.1269+0.000513T=0.13716.
5. The Design Quantity of the HFC-227ea fire suppression agent is:

COMES TO ABOUT 251.60 Kilograms.

REMARKS:
There is a rough calculation formula for your reference only:

But if you still do not know how to calculate and design the hfc-227ea fire suppression system and its quantity of extinguishing agent, please ask us for help, you just need to send us with project drawings and our technician team will help to design for you.

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